Michael H. Decker was the Assistant to the Secretary of Defense for Intelligence Oversight. from September 2009 to February 2014. Before that he was assistant director of Intelligence, Marine Corps Intelligence, United States Marine Corps. He served as Director of Intelligence during Operation Iraqi Freedom II from January 2004 to June 2005.

The Marine Corps Intelligence is the intelligence arm of the United States Marine Corps (USMC) and an element of the United States Intelligence Community. The Director of Intelligence supervises the Intelligence Department of HQMC and is responsible for policy, plans, programming, budgets, and staff supervision of Intelligence and supporting activities within the U.S. Marine Corps as well as supervising the Marine Corps Intelligence Activity (MCIA). The department supports the Commandant of the Marine Corps (CMC) in his role as a member of the Joint Chiefs of Staff (JCS), represents the service in Joint and Intelligence Community matters, and exercises supervision over the MCIA.